Cable securing device and method

Abstract

The present application relates to a kind of cable fixing device, including with the liquid cooling cable core (2) of gun shell (1) is connected, it is equipped with cable sheath (3) outside, cable sheath (3) is clamped between inner fixing part (4) and outer fixing part (5) in the end close to the gun shell outlet (101), after the combination of inner and outer fixing part, it is embedded in the gun shell outlet (101);Cable sheath (3) is wrapped with tail cover (6), tail cover (6) is equipped with tail cover sealing lip (61), tail cover (6) is equipped with tail cover fixing part (7) outside, the rear end of tail cover fixing part (7) locks tail cover (6), and the outer wall of the front part is connected with the gun shell outlet (101).The present application has the advantages of strengthening sealing while improving the fixing strength, so that the connection between each component is more stable.

Description

Technical Field

[0001] This invention relates to the field of automatic charging equipment technology, and in particular to a cable fixing device and method. Background Technology

[0002] Currently, the fixing structure of existing charging gun cables mostly adopts left and right wire clamping or metal tube riveting. To improve the sealing and fixing strength of the cable assembly, potting is often used. However, the existing potting process is complex, requires a large amount of glue, and is prone to curing after application. Chinese patent CN109462076A discloses a cable assembly with a plug, in which the cable is covered with an outer sheath and a cable shielding layer. The housing consists of a front plug housing and a rear plug housing. It also mentions filler glue, namely an inner potting glue and an outer potting glue. The outer potting glue is placed between the plug housing and the cable sheath, preventing external moisture, impurities, and other contaminants from entering the plug housing, thus avoiding affecting the service life of the components inside the plug housing and playing a sealing and dustproof role. However, the amount of inner potting glue is large, and this method only improves the sealing performance, without much effect on the fixing and locking strength. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of excessive glue application, complex processes, poor sealing, and low connection strength in existing cable fixing methods. It provides a cable fixing device that can improve the fixing strength while enhancing the sealing, making the connection between the components more stable.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A cable fixing device includes a liquid-cooled cable core wire connected to a gun housing, a cable sheath provided outside the liquid-cooled cable core wire, and one end of the cable sheath near the outlet of the gun housing is clamped between an inner fixing member and an outer fixing member. The inner fixing member has a groove on its outer wall facing the area where the cable sheath is squeezed. The inner fixing member and the outer fixing member are combined and embedded into the outlet of the gun housing. The cable sheath is covered with a tail sleeve. The front end of the tail sleeve is embedded in an annular cavity and has a tail sleeve sealing lip. A tail sleeve fixing component is provided outside the tail sleeve. The rear end of the tail sleeve fixing component locks the tail sleeve, and the front end is connected to the outer wall of the gun housing cable outlet to lock and fix the tail sleeve and internal device.

[0005] Furthermore, the front end of the internal fixing member is provided with a protruding hexagonal surface, and the outer wall of the internal fixing member is provided with a first external thread and a sheath support section from front to back. A first stepped platform is provided between the hexagonal surface of the internal fixing member and the first external thread, and a second stepped platform is provided between the first external thread and the sheath support section. A groove is provided on the outer surface of the sheath support section, and the diameters of the hexagonal surface of the internal fixing member, the first stepped platform and the second stepped platform decrease in sequence. The sheath support section is embedded in the cable sheath, and the cable sheath is just snapped onto the second stepped platform.

[0006] Furthermore, the external fixing member includes, from front to back, a fastening section, a pressing section, and a hexagonal surface of the external fixing member. A third stepped platform is provided between the fastening section and the pressing section, and the diameter of the fastening section is smaller than the diameter of the pressing section. The inner surface of the fastening section is provided with a first internal thread, which is connected to the first external thread of the internal fixing member. The cable sheath is pressed between the sheath support section and the pressing section, and a groove is provided on the sheath support section at the pressing point.

[0007] Furthermore, the groove is a U-shaped groove containing structural adhesive, which allows for the selection of whether or not to apply adhesive based on the magnitude of the holding force.

[0008] Furthermore, after the inner and outer fixing components are combined, the hexagonal surface of the inner fixing component is flush with the outer surface of the fastening section, and a limiting step is provided on the inner wall of the gun casing outlet, and the extrusion section is precisely locked on the limiting step.

[0009] Furthermore, an annular cavity is provided between the cable sheath embedded in the gun case and the gun case outlet. The annular cavity is positioned directly opposite the sheath support section. A protruding tail sleeve shoulder is provided in the middle of the tail sleeve. The tail sleeve sealing lip is connected between the inner wall of the cable sheath corresponding to the sheath support section and the gun case outlet. When the tail sleeve is fully embedded in the gun case outlet, the front end of the tail sleeve sealing lip contacts the rear end of the outer fixing component, and the tail sleeve shoulder is precisely locked at the port of the gun case outlet.

[0010] Furthermore, the outer wall of the gun casing outlet is provided with an annular boss and a second external thread, the inner wall of the tail sleeve fixing member is provided with a second internal thread, the second internal thread is connected to the second external thread, and the front end of the tail sleeve fixing member is just locked on the annular boss, the rear end is provided with an inwardly bent locking platform, and the shoulder of the tail sleeve is just embedded in the locking platform, so as to lock the tail sleeve and its internal components.

[0011] Furthermore, the inner side of the tail sleeve shoulder is provided with a raised annular rib, which is interference-fitted with the end face of the gun casing cable outlet.

[0012] Furthermore, the outer wall of the inner fixing member and the inner wall of the gun casing outlet are fitted with a clearance fit.

[0013] To further achieve the objectives of this invention, a cable fixing method is also provided, employing the above-mentioned device, with the following specific steps: (1) Insert the sheath support section of the inner fastener into the inner wall of the front end of the cable sheath, and choose whether to apply structural adhesive in the groove of the sheath support section according to the specific requirements of the holding force. (2) Slide the outer fastener over the cable sheath and lock the outer fastener and inner fastener together with the inner and outer threads. At this time, the cable sheath is squeezed and the squeezed position corresponds to the U-shaped groove of the inner fastener. (3) Assemble the assembled inner and outer fasteners together with the cable sheath into the gun housing. The third step of the outer fastener is engaged with the limiting step of the inner wall of the gun housing outlet, which serves as a limiting function. (4) Put the tail sleeve over the cable sheath and insert the sealing lip of the tail sleeve at its front end into the annular cavity between the cable sheath and the inner wall of the gun housing outlet. (5) The tail sleeve fixing part is locked to the gun shell cable outlet by internal and external threads, and its lower end is locked to the tail sleeve by the cooperation of the locking plate and the tail sleeve shoulder, thus completing the cable fixing.

[0014] Compared with the prior art, the specific advantages of the technical solution of the present invention are as follows: (1) The present invention can clamp the inner and outer clamping fasteners of the cable sheath. The inner and outer clamping fasteners can be bonded with structural adhesive or locked with mechanical structure to fix the cable sheath. (2) The inner clamping fastener has a groove for extruding the cable sheath between the outer wall of the inner clamping fastener and the inner wall of the outer clamping fastener. Structural adhesive can be applied to or not applied to the outer wall of the inner clamping fastener and the inner wall of the outer clamping fastener according to the required tensile force. (3) The internal fixing component and the cable outlet structure of the gun casing of the present invention adopt a clearance fit; (4) The tail sleeve of the present invention is provided with a sealing lip at the front end, and the sealing lip serves to seal the filling adhesive; (5) The inner side of the tail sleeve shoulder of the present invention has a raised annular rib, which is interference fit with the end face of the gun casing cable outlet to play a sealing role. Attached Figure Description

[0015] Figure 1 This is an assembly diagram of the cable fixing device of the present invention; Figure 2 This is a half-sectional view of the cable fixing device assembly of the present invention; Figure 3 for Figure 2 A magnified view of part A; Figure 4 This is an exploded view of the cable fixing device of the present invention; Figure 5 This is a structural diagram of the first step of the cable fixing method of the present invention; Figure 6 This is a structural diagram of the second step of the cable fixing method of the present invention; Figure 7 This is a structural diagram of the third step of the cable fixing method of the present invention; Figure 8 for Figure 7 A magnified view of part B; Figure 9 This is a structural diagram of the fourth step of the cable fixing method of the present invention; Figure 10 for Figure 9 A magnified view of part C; Figure 11 This is a structural diagram of the fifth step of the cable fixing method of the present invention; Figure 12 This is a structural diagram of the annular rib of the present invention. Implementation Example

[0016] To make the present invention clearer, a cable fixing device and method of the present invention will be further described below with reference to the accompanying drawings. The specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0017] In this invention, the direction closest to the outlet of the gun casing is designated as "front," and the opposite direction is designated as "rear."

[0018] See Figure 1 A cable fixing device includes a liquid-cooled cable core 2 connected to a gun housing 1, and a cable sheath 3 is provided outside the liquid-cooled cable core 2, characterized in that: See Figures 1-4 The end of the cable sheath 3 near the outlet 101 of the gun casing is clamped between the inner fixing part 4 and the outer fixing part 5; See Figure 3 , Figure 4 and Figure 5 The inner fixing member 4 has a protruding hexagonal surface 41 at its front end. The outer wall of the inner fixing member 4 has a first external thread 42 and a sheath support section 43 from front to back. A first stepped platform 44 is provided between the hexagonal surface 41 and the first external thread 42. A second stepped platform 45 is provided between the first external thread 42 and the sheath support section 43. The outer surface of the sheath support section 43 has a groove 4a at its front end. The groove 4a is a U-shaped groove and contains structural adhesive. The diameters of the hexagonal surface 41, the first stepped platform 44 and the second stepped platform 45 decrease sequentially. The sheath support section 43 is embedded in the cable sheath 3, and the cable sheath 3 is just snapped onto the second stepped platform 44. See Figure 3 , Figure 4 and Figure 6 The external fastener 5 includes a fastening section 51, a pressing section 52 and an external fastener hexagonal surface 53 from front to back. A third stepped platform 54 is provided between the fastening section 51 and the pressing section 52, and the diameter of the fastening section 51 is smaller than the diameter of the pressing section 52. The inner surface of the fastening section 51 is provided with a first internal thread 5a, which is connected to the first external thread 42 of the internal fastener 4. The cable sheath 3 is pressed between the sheath support section 43 and the pressing section 52, and the groove 4a is provided on the sheath support section 43 at the pressing point. See Figure 8After the inner fixing part 4 and the outer fixing part 5 are combined, they are embedded in the gun case outlet 101. The outer wall of the inner fixing part 4 and the inner wall of the gun case outlet 101 are fitted with a clearance. After the combination, the hexagonal surface 41 of the inner fixing part is flush with the outer surface of the fastening section 51. The inner wall of the gun case outlet 101 is provided with a limiting step 101c, and the squeezing section 52 is just stuck on the limiting step 101c. See Figure 4 , Figure 10 and Figure 12 An annular cavity is provided between the cable sheath 3 embedded in the gun case 1 and the gun case outlet 101. The annular cavity is set directly opposite the sheath support section 43. The cable sheath 3 is covered with a tail sleeve 6. The front end of the tail sleeve 6 is embedded in the annular cavity and has a tail sleeve sealing lip 61. The middle part of the tail sleeve 6 has a protruding tail sleeve shoulder 62. The inner side of the tail sleeve shoulder 62 has a protruding annular rib 62a. The annular rib 62a is interference-fitted with the end face of the gun case outlet 101. The tail sleeve sealing lip 61 is connected between the cable sheath 3 corresponding to the sheath support section 43 and the inner wall of the gun case outlet 101. When the tail sleeve 6 is fully embedded in the gun case outlet 101, the front end of the tail sleeve sealing lip 61 contacts the rear end of the outer fixing part 5, and the tail sleeve shoulder 62 is just stuck at the port of the gun case outlet 101. The tail sleeve 6 is provided with a tail sleeve fixing member 7. The rear end of the tail sleeve fixing member 7 locks the tail sleeve 6, and the front part is connected to the outer wall of the gun case outlet 101. The outer wall of the gun case outlet 101 is provided with an annular boss 101a and a second external thread 101b. The inner wall of the tail sleeve fixing member 7 is provided with a second internal thread 71, which is connected to the second external thread 101b. The front end of the tail sleeve fixing member 7 is just locked on the annular boss 101a, and the rear end is provided with an inwardly bent locking platform 72. The tail sleeve shoulder 62 is just embedded in the locking platform 72 to lock the tail sleeve and its internal components.

[0019] In this embodiment, the inner fixing member 4, the outer fixing member 5, the tail sleeve 6, the tail sleeve fixing member 7, and the cable sheath 3 are on the same axis.

[0020] The method for fixing cables using the above-mentioned device is as follows, and the specific steps include: (1) See Figure 5 Insert the sheath support section 43 of the inner fixing member 4 into the inner wall of the front end of the cable sheath 3, and choose whether to apply structural adhesive in the groove 4a of the sheath support section 43 according to the specific requirements of the holding force. (2) See Figure 6 The outer fixing part 5 is inserted into the cable sheath 3, and the outer fixing part 5 and the inner fixing part 4 are locked together by the internal and external threads. At this time, the cable sheath 3 is squeezed, and the squeezing position corresponds to the U-shaped groove part of the inner fixing part 4. (3) See Figure 7 and Figure 8 The assembled inner and outer fasteners, together with the cable sheath 3, are assembled into the gun housing 1. The third step 54 of the outer fastener 5 is precisely engaged with the limiting step 101c on the inner wall of the gun housing outlet 101, which serves as a limiting function. (4) See Figure 9 and Figure 10 The tail sleeve 6 is placed over the cable sheath 3, and the tail sleeve sealing lip 61 at its front end is inserted into the annular cavity between the cable sheath 3 and the inner wall of the gun housing outlet 101. (5) See Figure 11 The tail sleeve fixing part 7 is locked to the gun housing outlet 101 by internal and external threads, and its lower end is locked to the tail sleeve 6 by the cooperation of the locking plate 72 and the tail sleeve shoulder 62, thus completing the fixing of the cable.

[0021] The cable fixing device of the present invention can not only effectively seal, but also strengthen the connection strength and structural stability between the components. Each component is nested in a ring, with a tight structure. It can be selected whether to apply glue according to the required holding force, making the operation flexible and convenient.

[0022] In addition to the embodiments described above, the present invention may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.

Claims

1. A cable fixing device, comprising a liquid-cooled cable core (2) connected to a gun housing (1), wherein the liquid-cooled cable core (2) is provided with a cable sheath (3), characterized in that: The end of the cable sheath (3) near the gun housing outlet (101) is clamped between the inner fixing member (4) and the outer fixing member (5). The inner fixing member (4) has a groove (4a) on the outer wall of the cable sheath (3) that is being squeezed. The inner fixing member (4) and the outer fixing member (5) are combined and embedded into the gun housing outlet (101). The cable sheath (3) covers the tail sleeve (6). The front end of the tail sleeve (6) is embedded in the gun housing outlet (101) and a tail sleeve sealing lip (61) is provided on it. A tail sleeve fixing member (7) is provided outside the tail sleeve (6). The rear end of the tail sleeve fixing member (7) locks the tail sleeve (6) and the front end is connected to the outer wall of the gun housing outlet (101). The front end of the inner fixing member (4) is provided with a protruding hexagonal surface (41). The outer wall of the inner fixing member (4) is provided with a first external thread (42) and a sheath support section (43) from front to back. A first step (44) is provided between the hexagonal surface (41) and the first external thread (42). A second step (45) is provided between the first external thread (42) and the sheath support section (43). A groove (4a) is provided on the outer surface of the sheath support section (43). The diameters of the hexagonal surface (41), the first step (44), and the second step (45) decrease sequentially. The sheath support section (43) is embedded in the cable sheath (3). The cable sheath (3) is just snapped onto the second step (45). The external fastener (5) includes a fastening section (51), a pressing section (52) and an external fastener hexagonal surface (53) from front to back. A third step (54) is provided between the fastening section (51) and the pressing section (52), and the diameter of the fastening section (51) is smaller than the diameter of the pressing section (52). The inner surface of the fastening section (51) is provided with a first internal thread (5a). The first internal thread (5a) is connected to the first external thread (42) of the internal fastener (4). The cable sheath (3) is pressed between the sheath support section (43) and the pressing section (52), and the groove (4a) is provided on the sheath support section (43) at the pressing point.

2. The cable fixing device according to claim 1, characterized in that: The groove (4a) is a U-shaped groove, and structural adhesive is provided inside it.

3. The cable fixing device according to claim 1 or 2, characterized in that: After the inner fixing member (4) and the outer fixing member (5) are combined, the hexagonal surface (41) of the inner fixing member is flush with the outer surface of the fastening section (51). The inner wall of the gun case outlet (101) is provided with a limiting step platform (101c), and the squeezing section (52) is just stuck on the limiting step platform (101c).

4. The cable fixing device according to claim 3, characterized in that: An annular cavity is provided between the cable sheath (3) embedded in the gun case (1) and the gun case outlet (101). The annular cavity is set directly opposite the sheath support section (43). The tail sleeve (6) has a protruding tail sleeve shoulder (62) in the middle. The tail sleeve sealing lip (61) is connected between the cable sheath (3) corresponding to the sheath support section (43) and the inner wall of the gun case outlet (101). When the tail sleeve (6) is fully embedded in the gun case outlet (101), the front end of the tail sleeve sealing lip (61) contacts the rear end of the outer fixing member (5), and the tail sleeve shoulder (62) is just stuck at the port of the gun case outlet (101).

5. The cable fixing device according to claim 4, characterized in that: The outer wall of the gun case outlet (101) is provided with an annular boss (101a) and a second external thread (101b). The inner wall of the tail sleeve fixing member (7) is provided with a second internal thread (71). The second internal thread (71) is connected to the second external thread (101b). The front end of the tail sleeve fixing member (7) is just stuck on the annular boss (101a), and the rear end is provided with an inwardly bent locking platform (72). The tail sleeve shoulder (62) is just embedded in the locking platform (72).

6. The cable fixing device according to claim 4, characterized in that: The inner side of the shoulder (62) of the tail sleeve is provided with a raised annular rib (62a), and the annular rib (62a) is interference-fitted with the end face of the gun case outlet (101).

7. The cable fixing device according to claim 1 or 2, characterized in that: The outer wall of the inner fixing member (4) and the inner wall of the gun casing outlet (101) are fitted with a clearance.

8. A method for fixing cables using the device as described in claim 5, comprising the following steps, characterized in that: Step 1: Insert the sheath support section (43) of the inner fixing member (4) into the inner wall of the front end of the cable sheath (3), and choose whether to apply structural adhesive in the groove (4a) of the sheath support section (43) according to the specific requirements of the holding force. Step 2: Slide the outer fixing part (5) over the cable sheath (3) and lock the outer fixing part (5) and the inner fixing part (4) together through the internal and external threads. At this time, the cable sheath (3) is squeezed, and the squeezed position corresponds to the U-shaped groove part of the inner fixing part (4). Step 3: Assemble the assembled inner and outer fasteners together with the cable sheath (3) into the gun shell (1). The third step (54) of the outer fastener (5) is exactly engaged with the limiting step (101c) on the inner wall of the gun shell cable outlet (101). Step 4: Put the tail sleeve (6) over the cable sheath (3) and insert the tail sleeve sealing lip (61) at its front end into the annular cavity between the cable sheath (3) and the inner wall of the gun housing outlet (101); Step 5: The tail sleeve fixing part (7) is locked to the gun shell cable outlet (101) by the internal and external threads, and its lower end is locked to the tail sleeve (6) by the cooperation of the locking plate (72) and the tail sleeve shoulder (62), thus completing the cable fixing.

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